Could the chemicals in the lake you swam in as a kid give you cancer as an adult 20 years later? A new environmental documentary called “Living Downstream” tells the story of Dr. Sandra Steingraber, an ecologist and cancer survivor who’s working to educate the general public about what scientists already know about carcinogenic chemicals in our environment.

Cancer rates have skyrocketed in recent decades as the number of cancer-linked chemicals polluting our environment has increased. The Breast Cancer Fund and other organizations have long been connecting the dots between the two — and now, “Living Downstream” joins that cause. The film interweaves one woman’s personal fight against cancer with her more public fight against chemicals in our environment.

Here’s the trailer:

Screenings of "Living Downstream" are happening across the U.S. during Earth Month. Check the website to find a screening near you or purchase a DVD and hold your own screening! In the mean time, here are tips for reducing your environmental breast cancer risks.

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